Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2020c72334489270ffd09526c04b63ce0eaa343deb045e451eab53cb6ede5790' 
  AND token = 'k4FItEfbP8nU5KlGE2qVW8ewAcI7VNmkioTKb6q2LhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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