Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0f43b39d5ad6883b1a597d6274f8c21ebf246439ece35dd0c5c3754b217eacf9' 
  AND token = 'piQ2IreePyJabe/lXt2NJNbxcbzGRtdB20+uTfMei8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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