Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6699a4dcee1a0aa44cb89594b93edd96c18ececbc3cfe550855b871271fffc0d' 
  AND token = 'wKHoMCnbsRMqIHObKBMi+sq8cSbSziotgH6jOtzrGsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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