Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a82d651adac50fc538b539ec5d3164b1fdec66e1c8d51fd09b67e4c06969e140' 
  AND token = 'QBclgKkc+8Pm8exjlNTWgd+BgWNwrhEOIS5aWNd6HiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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