Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8c6a9d302acaf8c3eb7ce3d66ebdf14d1bf4e90dd345c58ef5b539f41dab4f6d' 
  AND token = '4JrgE9jz5TOAQDoh3VrYXcRUOioXzSRKaoiiDsYpAh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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