SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23770f9f9425fcb1b63dab3e15f882edd66ab5e675e431632f3bae8f655dee5e' 
  AND token = 'OF2B6ndnG0xQz0jhlmaR9UKo2LHtEsVDBVO+n8PXGho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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