Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab15e1fb907cbaafdfe7af0a1da958474a784e8a669220041f4b13a714a99638' 
  AND token = 'xp10+FNsmzz2desNegKavAx0KlrXu+xNlhVWEOnlM0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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