Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9eeb1d4b99392d216c8013c20435e7fe535c7a691e12d41bae8f2f1951f691ae' 
  AND token = 'oThzYKmZ/QbCCL1+aB1PD0v4K0NQIDODNgpailWJano=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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