Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4094925e4b38a459891b77161ffd06c001b41879788980c41ce838a221b3605a' 
  AND token = '4QixjCpeQ2tICycif62XzrehR48dS8D5bX+QN3kWEXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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