Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce5e396fc868ba404fd6fd3342d8d537953e09447e2893b732c5e2a5e6f5400d' 
  AND token = 'Xd2IiG/Xn9JBSfO1uLyaQkykfUttQ+SO1kJqMnSki04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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