Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cda4fdf6dfd2e31c354402705ab847b869def05105abc408f0f3e5c137e4c44c' 
  AND token = 'Ez4jAG7n59nBm2ahQP2gqt9jRbFRfuGBRSEdat0Upxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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