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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '380cf4adec7cb458b6cb84726f6a4547aa65fe8bd9cf141fc2804b47679dcab7' 
  AND token = '7qZHCP2TkYrcGVhMX73jWA1k74ux8Od3TEtFhrNPc/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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