Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c457d7fbd71b3536821b0c9dfcf52302764bfbbe8182ab4254118ce91e106d4' 
  AND token = 'Z7Jyy52PoIxebs7AT14QyoCORMkLVzuiQNzQ8Z7yELY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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