Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c990044193db94b0ce72bd4ff103174f27f89eb9fe9d2ffebd66a796d67de1a5' 
  AND token = 'XudMfINlLpxaSDUNxqeeoxzMxyv8LeXwlw80W0hus1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}