Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38446e38f7d42dacb95ccef773d3f8d0dd50d2a17a75431c3d152176a79088e3' 
  AND token = 'ffCfiJmVf8RUAyBOpmjgWgLUICQD+4RRSklis2JH7Vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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