Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '192b19a9c22586bac0860c3f36c4ac14d813cc98ee1f212ecaa069f936b4eb7a' 
  AND token = 'hoSUbRl6J/2TkHFIfYD0fRlM6X4p2nEidCNaxiAgR3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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