Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f869fd9a24d6fb848882976250463443a6a94520795ab43fb07f284c133e5a05' 
  AND token = 'r+whSRCPizeQuivbQ2rJe54o38XN7CurtRhjelEC83w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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