Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '673092c72caa858a141ff6ca239f563ccd1d7fe28e37c2fd251d039811aaa4fb' 
  AND token = 'TBDCsPWrYqR5eH3S/k4vO78fExmAvr+KmICxRHGNVaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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