SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '007abd8e244c82565865076d66a0e2a439594dd2d293e0bae3903cbec50f6387' 
  AND token = 'VTKFHkwvTfycUBs0+jYNjJR1LYq5U3MsOPj5+pLT+yQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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