SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84d6949eeff26640d9d8a89d3a9f1b5505f8e06095d4fa7d7485f714a3bcb77b' 
  AND token = 'aU2+DLQh9yx4q/5mWWYfKieKHIXzKIRer81ZwbaAbJY=' 
  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"
    }
  }
}