SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2086f2f76ffff9694eb2bc4397a7dab1f48e21b9b3346a1debc457656d33d566' 
  AND token = 'ihJWK+yMXohE9vV8FLaVOZXCRa/Sls0o7chSUHQN66Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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