Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca2ff1c126f0e651dbd46b1fd621b7a83974a4d4643c7f38471c587d732fc1cd' 
  AND token = '+jDtND2tISpv7E/yUW01BWMZItNjckK3oefTmvNbEqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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