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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '73e920bda041b7d659be20ab2b100b5ad33e4ab81ab4128397f72304ef95c1e2' 
  AND token = 'LHkASXvvNiLodVO57H/6kujqzG+a4lMmVazQ5vS/J0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}