Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20828dafdb64ae658f717d874995337cd269d747b96db7fbec1be7d2c8e14fa6' 
  AND token = '43Z46C6oSOGsINpuSoVaoxPPK8qu4XpotOZNTonQblU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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