Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5903cd3f5ff5197a62a33d1e8af5bcf53b9504e431427c8a8c41fceea5943ef4' 
  AND token = '0BCI2OyDJSQnXp0erZT2+7RDb80VPX6X/I2QT/b/rKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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