Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ead9300a5dc31c7abc89266c9e554ff8d13ac88e0714beb98f28984a3f2370d' 
  AND token = 'lKDR1FkzZdKnkSEAA5XLyAOOvPFu1y0Cqj7HqD5d1YI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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