Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6c2b92d7e8ff075e9e07eafa905a4c78bf0949d19389901f52683223ea12848' 
  AND token = 'XIqnyCFh2vboOya9U64mdetq9hXypn2SwJXRb/c75og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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