Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'e070c307b46517671a429270c1b3ccc47fa73f76415ba3ecb2758b38ab3c09cc' 
  AND token = 'Niql0IpqbJaD8Yno44bUMkdyDz6CGPokZYqQ5Q9fmNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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