Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eb81ce9cd75b3458a27f9d431dc7a5c226e8c3ee02853e807dd85b3c514b261' 
  AND token = 'qp4n6M89TJCfR3OOi4V2Wv6DkUKHE+xQ1uOXtPUNBwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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