Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1716bb2a5cf819998601d39140fca310531b0bcc5cb7f9d2b6351df386ecdd3' 
  AND token = 'wZm7sO0wIeCGFUZVVMws0KRGT+6nWyFvX2nD18JixZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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