Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d14d6296d13b9de1373237d93221173f724e393077df2e429a15da4710471ed' 
  AND token = 'haeKe5vCAJm78xR3EU/IJ4i9ApMuJU14m2lJLSq43Zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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