SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0012c201bf45fa38ae3d911e34b12f61196302768e63a54b857a4e13c0e067aa' 
  AND token = 'BzuxQZXGQWeUokJDOKjkYtpBa2pb/eIN1ROhT1BzSHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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