Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39eb91d28c9f555aa9a950b0c67f8eddc40cecebfaa3ce7fd5af8be5adaa54b1' 
  AND token = 'AaqMAl3FriV07dKgZDXOWbgIR7txa9gmJcWEMK05lWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}