Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cf721f90a384223934294ccba9c6ef76dc6629200c5266ba996ab4b9193d4f1' 
  AND token = 'gWkVET7bsXryAXQdUieTFVizJRqij4I/RrmCvYuZCPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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