Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b049d96c09e007c7d91dea4251e401f0696a407591a082714f2e3b91b36a69bb' 
  AND token = 'ZZixBrN8S1637tevjLkupdgPIEMHfUkfr50+RHHr8VY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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