Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b9083a4027fd88f47bfcc45b0dabb460ad07988248005b68dca8f174a336766' 
  AND token = 'LfVaZYbUBb7aoPnUdlG+zlaSrz7+mdBMYNBXz7noswc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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