Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81ac4698abf3ffa3ea23f74ddf7fd03daa63cec760746b897a0f384d96be964e' 
  AND token = 'Smpyd9t8QEjikvXr8ENkqBXDFjGDOTaHNmpTZd0Udtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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