Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c89a17692d92c421825ef3303960f7eecba92854a46683fa6e890bba429e9577' 
  AND token = 'YQGK2UaAh2crUp2EMrDh2iIU0sV50jjOd13ZzdAOgzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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