SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f204391d9c215d01bcc923f33611d564bb1462d49473783a367bab65a8b3d197' 
  AND token = 'wzTG+BBqVSB5mcuC8Log0Et/2uqvujN+uKrEwh08P0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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