Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f53e18eac6889ae5a2a327bba3906c3ab6ef937a23b138e9f97173311265ba1b' 
  AND token = 'BPuf46KOFqpAkn5XD6NkBTm3gULlev/2JBIRstqyhLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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