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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fa4e7e908ffa03d9bfe74b639b9aff35bba1334f55df7b366d12fd1305310689' 
  AND token = 'OpzFfV8rf3ifDjnx5u24vA4qcqHvIyTKo9NpPf5hsnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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