Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03186da8ecf374835b601296a27926bd74897344d0454c71fbb14c6e48e8528f' 
  AND token = 'G7haXdMgtIUflVooVMKAbN1X18EsYOuj4zcxlZQ83EA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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