Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63856f5089fc1c134370fef505d82040598db4609218d86142e63634b30fc11f' 
  AND token = 'BAkdeDRpOnhICwnydv91uINr4Bq4WWVNYCfJEhsKxZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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