Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10ee9fb68fb16261fa91001d821c4e982d46c7a091588c9f1ecd63f50f78a8bd' 
  AND token = 'nF5ttvQ6ZAPbPu2Cg6YWLCVQKNcfTUpBmNv2Bcm9iLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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