Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adb78759be9f972984e64a767663ff713189795b0b49acedee346ed8732469e5' 
  AND token = 'jaXkIYxfPoUkQgg2lIPYZCMOZNHmq8FGU2fX08CDAXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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