Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55eaad28dfb047ac8957709150c3a64f33844b57e19017a1cad6b28e5877e367' 
  AND token = 'pGUv9IRzHD7DDgYXakcDvpIx9iOX/79sxVfwzKVrlL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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