Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c0257a38045f96ce0e5439b9d43dbc0155082d4c4d319a1ba60095fa3b95946' 
  AND token = 'OidF6y0J+8Z44v+Q2UdXktcZTn/6JkHfA9LOyCBPC+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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