Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf7dcaf3b0381a696e8b0780aa141b3859885f46e61d6f551af797d844b60ad5' 
  AND token = 'OfmDDE0aigN6rRSgASpYcYiFvNpclr6zHajQ2u5w80c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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