Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f7019430fb0f842b665361c7521061c4f4d7ba1db2db98237fe0361caa136a4' 
  AND token = 'Oxz67U7V7cyyQNvDjdCvm3jWA8EJQbC8EwwViRWpBCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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