Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '076a656942a74d10297ae1dee7afa68775ffc6b458a65882af116877993496ab' 
  AND token = 'EtP/7/4RG+MaWunppFp1YEwYTz1N/7T9IQUw3dQjzpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}