SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2383544be9db3b19bc66e860cea9572525e7f006839bc5b7ac7d01400620c459' 
  AND token = 'CWYSzH0CTjhJJCKUTGR/OBf+8M6lbUEmumVuwvK3860=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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