Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1bd2a40463aa4c5aa4fc9e2b5c1c62a2133322ecbe8989d693e72d021acdd0b9' 
  AND token = 'y9AeiTz0tSRJHhO2a7up5bNiHY0e3lZPB4e8ZSb0orQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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