Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd84e65c6f14773f09a5f7609e0b0b5f776f29d9831632957d01d83bbc3fb8f54' 
  AND token = '4heya/0P33dDeHTbSkkiqEbL7GqPO2wtqqwvsPvDXnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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