Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d043b3aa89939e3baac56f3749c61cea6c42f2d1de9e84a045156d46427ed56' 
  AND token = '32lhKoPu79ZUbWqL0zaF9nlSrun7syk3npDzGEg4Q44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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