Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd53fca8517783efbe024113017872663a55d90ed59437d5ab797f98544213125' 
  AND token = 'X5D8flAL4knwLGxEt34e9iVJVDVd1UzjIHHw6JuFBEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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