Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1c8f2a727f4205a345620127022803ee2d6e253591fd339a64a91a226575c00' 
  AND token = '0WIaZIcYt57QQP7fuk/T/zKhhGdhsisRWWrGCO+jEFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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