Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7294760c92366d70026356c43d0c1c69df3752aa8496eff2eec1d5d6ca00d580' 
  AND token = 'Gh9UDoaMD2tNL3UJjzf3KvVpDdykmT1X9lH7m6phYg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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