Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b461689f1d0e6d6b21b69c9af21a7e20494091d6e577c335f7f8faf30870dc06' 
  AND token = 'D4VaZT7NX+prSD+tQq/g6i/lwS9RSWMiCMctn4smmmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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