Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4ed70b975306cd546b18667f1f42dbc038afdf3ac971e119252efd5c53a7e92' 
  AND token = 'PiO4s322o1zl+z++4Cran+oBW6HDhQsA5hZFfhAo4TI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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