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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b015bfb374d7c690b065b3fd49dea23de3b260e562a7cdc7b0aef7a134532033' 
  AND token = 'Fmpec/QQlRsiOtFhJhyiQF7baUhoPKZFSx+Ix2b7mgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}