Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe8c3920a02b45dcbfdddc841295d67972a9f2806ba9a154ad2763befe055681' 
  AND token = 'ZD/uK/MwoXR08nRtLCPGKDFeX/VjdEr9i15T1KKnBww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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