Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0983456bc4b5aabf66106f2d8ebc52543020148f11267930e78fe774cc5bfcc4' 
  AND token = '5RXh7MmA3z5RZrHP0bVqIwUa6nmaGEa4UAtU1CO95CU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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