Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee4d5bb9c64c99db8da9696df005e609047da5f004ecd3fb2783ba2dbddf33a7' 
  AND token = '9NvdkfTpfOnhEqtehavyszYfL+kPkTL8eXiXsgL3S1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}