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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '87f1ae056b5228cc8051ef901f76cd5956ab7cab3d4eb9f96b3e945cbf19cdec' 
  AND token = 'BiHBMlHEf5T0HSxtPvcPlw/XGwTcOdnxx/ggEgbd5jY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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