Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c00c169cb90717fb11b7b3cea947f8d943f7cc3e4b88f194171cf2dbc5e0c44' 
  AND token = 'EfVzEvyjDSxAGIExmpV4aAgEY5WOL2FqHKFJYs9ee5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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